###Information about the summary choices made:
- The X_test, subject_test and Y_test data was combined
- Similarly X_train, subject_train and Y_train data was combined
- The two sets produced in 1 and 2 where combined
- Selected the set of columns that depict mean and standard deviation
- Enriched activity so that the alpha numeric description is used
- Made the column descriptions human readable by expanding abbreviations
- Produced the mean of all remaining variables grouped by activity and subject
- Wrote the output out to a txt file
###Information about the variables (including units!) in the data set contained in the tidy data:
"subject" - subject number "ActivityName” - alphanumeric description "TimeBodyAccelerationMeanX" - time in ms "TimeBodyAccelerationMeanY" - time in ms "TimeBodyAccelerationMeanZ" - time in ms "TimeBodyAccelerationStdX" - time in ms "TimeBodyAccelerationStdY" - time in ms "TimeBodyAccelerationStdZ" - time in ms "TimeGravityAccelerationMeanX" - time in ms "TimeGravityAccelerationMeanY" - time in ms “TimeGravityAccelerationMeanZ" - time in ms "TimeGravityAccelerationStdX" - time in ms "TimeGravityAccelerationStdY" - time in ms "TimeGravityAccelerationStdZ" - time in ms "TimeBodyAccelerationJerkMeanX" - time in ms "TimeBodyAccelerationJerkMeanY" - time in ms "TimeBodyAccelerationJerkMeanZ" - time in ms "TimeBodyAccelerationJerkStdX" - time in ms "TimeBodyAccelerationJerkStdY" - time in ms "TimeBodyAccelerationJerkStdZ" - time in ms "TimeBodyGyroMeanX" - time in ms "TimeBodyGyroMeanY" - time in ms "TimeBodyGyroMeanZ" - time in ms "TimeBodyGyroStdX" - time in ms "TimeBodyGyroStdY" - time in ms "TimeBodyGyroStdZ" - time in ms "TimeBodyGyroJerkMeanX" - time in ms "TimeBodyGyroJerkMeanY" - time in ms "TimeBodyGyroJerkMeanZ" - time in ms "TimeBodyGyroJerkStdX" - time in ms "TimeBodyGyroJerkStdY" - time in ms "TimeBodyGyroJerkStdZ" - time in ms "TimeBodyAccelerationMagMean" - time in ms "TimeBodyAccelerationMagStd" - time in ms "TimeGravityAccelerationMagMean" - time in ms "TimeGravityAccelerationMagStd" - time in ms "TimeBodyAccelerationJerkMagMean" - time in ms "TimeBodyAccelerationJerkMagStd" - time in ms "TimeBodyGyroMagMean" - time in ms "TimeBodyGyroMagStd" - time in ms "TimeBodyGyroJerkMagMean" - time in ms "TimeBodyGyroJerkMagStd" - time in ms "FrequencyBodyAccelerationMeanX" - frequency in Hz "FrequencyBodyAccelerationMeanY" - frequency in Hz "FrequencyBodyAccelerationMeanZ" - frequency in Hz "FrequencyBodyAccelerationStdX" - frequency in Hz "FrequencyBodyAccelerationStdY" - frequency in Hz "FrequencyBodyAccelerationStdZ" - frequency in Hz "FrequencyBodyAccelerationMeanFreqX" - frequency in Hz "FrequencyBodyAccelerationMeanFreqY" - frequency in Hz "FrequencyBodyAccelerationMeanFreqZ" - frequency in Hz "FrequencyBodyAccelerationJerkMeanX" - frequency in Hz "FrequencyBodyAccelerationJerkMeanY" - frequency in Hz "FrequencyBodyAccelerationJerkMeanZ" - frequency in Hz "FrequencyBodyAccelerationJerkStdX" - frequency in Hz "FrequencyBodyAccelerationJerkStdY" - frequency in Hz "FrequencyBodyAccelerationJerkStdZ" - frequency in Hz "FrequencyBodyAccelerationJerkMeanFreqX" - frequency in Hz "FrequencyBodyAccelerationJerkMeanFreqY" - frequency in Hz "FrequencyBodyAccelerationJerkMeanFreqZ" - frequency in Hz "FrequencyBodyGyroMeanX" - frequency in Hz "FrequencyBodyGyroMeanY" - frequency in Hz "FrequencyBodyGyroMeanZ" - frequency in Hz "FrequencyBodyGyroStdX" - frequency in Hz "FrequencyBodyGyroStdY" - frequency in Hz "FrequencyBodyGyroStdZ" - frequency in Hz "FrequencyBodyGyroMeanFreqX" - frequency in Hz "FrequencyBodyGyroMeanFreqY" - frequency in Hz "FrequencyBodyGyroMeanFreqZ" - frequency in Hz "FrequencyBodyAccelerationMagMean" - frequency in Hz "FrequencyBodyAccelerationMagStd" - frequency in Hz "FrequencyBodyAccelerationMagMeanFreq" - frequency in Hz "FrequencyBodyBodyAccelerationJerkMagMean" - frequency in Hz "FrequencyBodyBodyAccelerationJerkMagStd" - frequency in Hz "FrequencyBodyBodyAccelerationJerkMagMeanFreq" - frequency in Hz "FrequencyBodyBodyGyroMagMean" - frequency in Hz "FrequencyBodyBodyGyroMagStd" - frequency in Hz "FrequencyBodyBodyGyroMagMeanFreq" - frequency in Hz "FrequencyBodyBodyGyroJerkMagMean" - frequency in Hz “FrequencyBodyBodyGyroJerkMagStd" - frequency in Hz "FrequencyBodyBodyGyroJerkMagMeanFreq" - frequency in Hz